A Northrop Grumman Antares rocket will launch the Cygnus NG-11 cargo mission from Virginia today (April 17) at 4:46 p.m. EDT from NASA's Wallops Flight Facility on Wallops Island, Virginia. You can watch it live here, beginning at 4:15 p.m. EDT (2015 GMT).
https://www.space.com/17933-nasa-television-webcasts-live-space-tv.html